Actually, no one can force an opinion on you – no matter how hard they try. At SDMB I don’t usually have a problem with someone pushing an opinion. In the mundane world, I resent it.
If you want your opinion to have more punch, don’t use “I think” or “I feel.” (The latter applies to emotions and not arguments anyway.) If you want to be polite, then do use those words as preface.
These people are a lot of fun - types who think there’s no possible way we can determine such things as the age of the earth or the distance to the sun, say, so any old opinion is as valid as another. You’ve nailed the type.
I enjoy the OPPOSITE type too, though: people who think all opinions are Level Two opinions. Beets are intrinsically yukky (or yummy), and if you disagree, you’re just wrong. This is a form of egomania: if I feel this way, the whole universe must, by extension, feel the same way.
My mother used to use this one on me.
Mom: “Eat your brussels sprouts.”
Me: “I don’t like brussels sprouts.”
Mom: “You just don’t know what’s good.”
Because I couldn’t figure out for myself what tasted good and what didn’t. Of course, it all makes sense now.
This in no way decreases my mother’s eternal awesomeness.